Double-soft graviton amplitudes and the extended BMS charge algebra

被引：28

作者：

Distler, Jacques ^{[1
,2
]}

Flauger, Raphael ^{[3
,4
]}

Horn, Bart ^{[5
]}

机构：

[1] Univ Texas Austin, Dept Phys, 2515 Speedway MS C1608, Austin, TX 78712 USA

[2] Univ Texas Austin, Weinberg Theory Grp, 2515 Speedway MS C1608, Austin, TX 78712 USA

[3] Univ Calif San Diego, Dept Phys, 9500 Gilman Dr 0319, La Jolla, CA 92093 USA

[4] Univ Calif San Diego, High Energy Theory Grp, 9500 Gilman Dr 0319, La Jolla, CA 92093 USA

[5] Manhattan Coll, Sch Sci, Dept Phys, 4513 Manhattan Coll Pkwy, New York, NY 10471 USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2019年 / 2019卷 / 08期

基金：

美国国家科学基金会;

关键词：

Classical Theories of Gravity; Gauge Symmetry; Scattering Amplitudes; Space-Time Symmetries; ASYMPTOTIC SYMMETRIES; GRAVITATIONAL WAVES; GENERAL RELATIVITY; CONSERVATION-LAWS; HOLOGRAPHY; SPACETIMES;

D O I：

10.1007/JHEP08(2019)021

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

We discuss how scattering amplitudes in 4d Minkowski spacetime which involve multiple soft gravitons realize the algebra of BMS charges on the null boundary. In particular, we show how the commutator of two such charges is realized by the antisymmetrized consecutive soft limit of the double soft amplitude. The commutator is expected to be robust even in the presence of quantum corrections, and the associated Lie algebra has an extension, which breaks the BMS symmetry if the BMS algebra is taken to include the Virasoro algebra of local superrotations. We discuss the implications of this structure for the existence of a 2d CFT dual description for 4d scattering amplitudes.

引用

页数：67